Transparent staircase



FIG. 1 is a perspective view of a transparent staircase showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof; and,

FIG. 4 is a right side elevational view thereof, the left side elevational view being a mirror image thereof. 

I claim the ornamental design for a transparent staircase, as shown and described. 